Quiz  /  Machine Kinematics Class 9 MCQ Questions With Answers

  • 1. 
    Which graph shows a person jogging away at a constant pace?

  • A
  • B
  • C

  • 2. 
    Speed is a __________ quantity and velocity is a __________ quantity.

  • scalar, vector
  • vector, scalar

  • 3. 
    A quantity that is ignorant of direction is referred to as a

  • vector quantity
  • scalar quantity

  • 4. 
    How much time would it take for an object to fall 4.7 meters?

  • 0.959 s
  • 4.79 s
  • 0.979 s

  • 5. 
    An object is NOT accelerating if it is moving

  • in a circle
  • at constant velocity
  • at increasing speed
  • only as influenced by gravity

  • 6. 
    A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops?

  • 4.20 m
  • 52.5 m
  • 105 m
  • 158 m

  • 7. 
    What is the SI unit for acceleration?

  • m/s
  • m
  • m/s2
  • s

  • 8. 
    A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?

  • 24 m/s2
  • 18 m/s2
  • 16 m/s2
  • 16 m/s

  • 9. 
    What is the SI unit for speed and velocity?

  • Km
  • s
  • m/s
  • m/s2

  • 10. 
    The SI unit for length or distance is

  • foot (ft)
  • inch (in)
  • mile (mi)
  • meter (m)

  • 11. 
    If a car is traveling forward at 15 m/s, how fast will it be going in 1.2 seconds if the acceleration is -10 m/s2?

  • 27 m/s
  • 3 m/s
  • -27 m/s
  • -3 m/s

  • 12. 
    What happens to the velocity of a ball as it is dropped off a cliff?

  • It decreases at a uniform rate
  • It increases at a uniform rate
  • It is constant
  • It increases at a non-uniform rate

  • 13. 
    The speedometer on your car tells you

  • average velocity
  • instantaneous velocity
  • average speed
  • instantaneous speed

  • 14. 
    The SI unit for time is

  • second (s)
  • minute (min)
  • hour (hr)
  • year (yr)

  • 15. 
    A quantity that is has magnitude and direction is referred to as a

  • vector quantity
  • scalar quantity

  • 16. 
    A car slows down from +32 m/s to +8 m/s in 4 s. The acceleration is

  • 6 m/s/s opposite the motion
  • 2m/s/s in the direction of motion
  • 8 m/s/s opposite the motion

  • 17. 
    A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be:

  • 19.6 m/s
  • -5.4 m/s
  • -44.6 m/s
  • 44.6 m/s

  • 18. 
    A change in velocity over time is known as:

  • acceleration
  • constant speed
  • average speed
  • displacement

  • 19. 
    An airplane lands on a runway with a velocity of 150 m/s. How far will it travel until it stops if its rate of deceleration is constant at -3 m/s2?

  • 525 m
  • 3750 m
  • 6235 m
  • 9813 m

  • 20. 
    At 60 seconds, how far had this object traveled?

  • 0 m
  • 10 m
  • 20 m
  • 40 m

  • 21. 
    A dog runs with an initial speed of 7.5 m/s to a stop in 15 seconds. What is the dog's acceleration?

  • -7.5 m/s
  • -7.5 m/s2
  • -0.5 m/s2
  • 7.5 mi//hr

  • 22. 
    A cheetah travels 75 m in 3 s. What is her velocity over the interval?

  • 225 m/s
  • 25 m/s
  • 0.04 m/s

  • 23. 
    An object can be moving for 10 seconds and still have zero displacement.

  • True
  • False

  • 24. 
    The unit we use to measure acceleration is ___.

  • meters / second
  • meters
  • seconds
  • meters / second / second

  • 25. 
    A _________ quantity is completely described by magnitude alone. A _________ quantity iscompletely described by a magnitude with a direction.

  • vector, scalar
  • scalar, vector

  • 26. 
    A boat travels 12.0 m while it reduces its velocity from 9.5 m/s to 5.5 m/s. What is the magnitude of the boat’s acceleration while it travels the 12.0 m?

  • 1.3 m/s2
  • 2.5 m/s2
  • 3.0 m/s2
  • 7.5 m/s2
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